Thanks, yes, I’m afraid we’ve established that the box has reached the end of its life! I tried connecting again, switched Ethernet cables, restarted everything etc. The next time I switched on, it didn’t even reach the home screen, but tried to “install software”. But again, wouldn’t connect. I called Virgin, and just this minute have spoken to an engineer. They weren’t able to help remotely, so they’re sending a new box.
FYI (in case it ever helps anybody else), when I said that “My Shows” were displayed differently, I mean that the left-hand panel had appeared, which I normally don’t display. They weren’t sorted alphabetically, as I normally have them, and old series links had reappeared from nowhere.
So basically, I think the box just had a right old wobble and then died!!!
Thank you very much for your help and responses though, I appreciate you taking the time. Have a good weekend!